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Calling all geeks!
Sep. 8th, 2005 10:50 amI need to make a little controller/driver box.
It needs to run on 12v; the 12v will be provided only when my car's lighting system is on.
There will be feeds from tail light, brake light, reversing light, and handbrake.
The output will be 7 or 12 RGB LEDs (lots and lots of wire!) arranged around the perimeter of a perspex slice.
When the car's lights are on and the handbrake is applied, the red and blue components will be illuminated to give purple.
When the handbrake is off, the red component will be illuminated at half intensity.
When the handbrake is off and the brake lights are on, the red will be illuminated at full intensity.
When the reversing light is on, either the green component or all three components will be illuminated to give white (if they work that way), unless the brake is pressed upon which it will switch to full red.
When the lights are off, there will be no illumination.
Anyone have a circuit/can design a circuit that will do this? IIRC the RGB LED requires 2.0v for one colour and 4.0v for the other two; the colours use a common cathode or anode and individual wires for the counterparts (any benefit to a given configuration?). The LED can draw 100mW IIRC, so my total board consumption will be 1.2W at most.
There may be a small market for a professional-quality board (i.e. a PCB which covers the area required, with the LEDs mounted and embedded in the perspex component, the perspex back-silvered and the fitting required being a case of prepwork to the car, feeding the wires through and clipping the connector to the car's loom). At the very least if someone can tell me what I need, I can go to Omni and get some veroboard and have a go at making it myself. I don't think I need PIC controllers, just voltage regulators, a resistor or two and maybe a couple of diodes.
EDIT:
http://www.ledtronics.com/ds/dis1024/default.asp - the LEDs, if not the acutal ones, the basic type.
I see these can generate 256 colours. So, would a set of three variable resistors allow you to tailor the outputs of the LEDs to match the car colour, or are they going to be different enough per LED that it would take three VRs per LED to be able to do so?
It needs to run on 12v; the 12v will be provided only when my car's lighting system is on.
There will be feeds from tail light, brake light, reversing light, and handbrake.
The output will be 7 or 12 RGB LEDs (lots and lots of wire!) arranged around the perimeter of a perspex slice.
When the car's lights are on and the handbrake is applied, the red and blue components will be illuminated to give purple.
When the handbrake is off, the red component will be illuminated at half intensity.
When the handbrake is off and the brake lights are on, the red will be illuminated at full intensity.
When the reversing light is on, either the green component or all three components will be illuminated to give white (if they work that way), unless the brake is pressed upon which it will switch to full red.
When the lights are off, there will be no illumination.
Anyone have a circuit/can design a circuit that will do this? IIRC the RGB LED requires 2.0v for one colour and 4.0v for the other two; the colours use a common cathode or anode and individual wires for the counterparts (any benefit to a given configuration?). The LED can draw 100mW IIRC, so my total board consumption will be 1.2W at most.
There may be a small market for a professional-quality board (i.e. a PCB which covers the area required, with the LEDs mounted and embedded in the perspex component, the perspex back-silvered and the fitting required being a case of prepwork to the car, feeding the wires through and clipping the connector to the car's loom). At the very least if someone can tell me what I need, I can go to Omni and get some veroboard and have a go at making it myself. I don't think I need PIC controllers, just voltage regulators, a resistor or two and maybe a couple of diodes.
EDIT:
http://www.ledtronics.com/ds/dis1024/default.asp - the LEDs, if not the acutal ones, the basic type.
I see these can generate 256 colours. So, would a set of three variable resistors allow you to tailor the outputs of the LEDs to match the car colour, or are they going to be different enough per LED that it would take three VRs per LED to be able to do so?
